A 51-Year-Old Male With Abdominal Distention, Pain, and A Retroperitoneal Mass

Poll

A 51-year-old man noticed abdominal swelling and distention with intermittent abdominal pain, early satiety, and decreased appetite over the past several months. A computed tomography scan of the abdomen is performed. What's your diagnosis?

A 51-year-old man noticed abdominal swelling and distention with intermittent abdominal pain, early satiety, and decreased appetite over the past several months. A computed tomography (CT) scan of the abdomen showed massive fat containing omental mass with a dominant solid component in the center (Figure A). After a CT guided biopsy (Figure B), he underwent surgical resection of this large retroperitoneal mass revealing a 33-pound macroscopic tumor (Figure C).

Based on the images shown, what is your diagnosis?

A. Retroperitoneal leiomyosarcoma
B. Retroperitoneal malignant fibrous histiocytoma
C. Retroperitoneal fibrosarcoma
D. Exophytic renal angiomyolipoma
E. Retroperitoneal liposarcoma
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